Issue: SPR-14432

Issue: SPR-13188

Issue: SPR-14432

Issue: SPR-13794

Issue: SPR-14436

Issue: SPR-13188

Issue: SPR-14427

This commit removes `GuavaCache` and support classes. Caffeine supersedes
the caching support in the Google Guava library with an actively maintained
Java 8+ version in standalone form.

As it is the only Guava feature Spring framework integrates with, this
commit removes effectively any reference to Guava.

Issue: SPR-13797

SPR-14055 introduced first-class support for the Java 8 Parameter API.

This commit therefore replaces the MethodParameterFactory with use of
the new SynthesizingMethodParameter.forParameter(Parameter) factory
method.

Issue: SPR-13575

Issue: SPR-13575

* pr/1100:
  Remove trailing whitespaces
  Add the injection point for the Provider

Closes gh-1100

See gh-1100

Issue: SPR-13188

Also, equals insists on the same class now, differentiating from SynthesizingMethodParameter.

Issue: SPR-14055
Issue: SPR-13456
Issue: SPR-14438

Issue: SPR-14425

Issue: SPR-14433

Issue: SPR-14432

Issue: SPR-14432

* pr/1099:
  Polish doc

Closes gh-1099

Issue: SPR-13294

Issue: SPR-13793

This commit also removes support code for outdated options which were only available in older schema versions.

Issue: SPR-13499

This commit also renames WebSocketIntegrationTests to WebSocketHandshakeTests.

Issue: SPR-14328

Issue: SPR-14429

This commit adds a test runtime dependency on log4j 2 for every project
and migrates all log4j.properties files to log4j2-test.xml files.

Issue: SPR-14431

Issue: SPR-13575

Issue: SPR-13188

Issue: SPR-13810

Issue: SPR-14429

Issue: SPR-14430